Public water system · NY2902851
ActiveRoslyn Wd
At a glance
Roslyn Wd (PWSID NY2902851) is an active community water system in Nassau County, New York. It reports serving 17,000 people through 5,857 service connections. Its primary water source is groundwater, and EPA lists it as under public/private ownership. Of the 12 most recent violations in EPA's records, one is health-based, and the most recent began in January 1996.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
17,000
Service connections
5,857
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Roslyn Wd compare with other water systems in Nassau County?
By EPA's size categories, Roslyn Wd is a large system (10,001 to 100,000 people). Nassau County has 44 active public water systems. Its population served is about half of the county average of 31,534 people per system, and accounts for 1.2% of the 1,387,479 people reported by systems filed under the county. Across New York, the 8,167 active systems average 2,374 people each. Nationally, the average active community water system reports serving 6,703 people, so Roslyn Wd is about 154% above that figure.
What does “community water system” mean?
A community water system serves at least 15 connections used by year-round residents, or regularly serves at least 25 year-round residents. Homes, apartments and mobile-home parks are served by these. New York has 2,281 active community water systems, 28% of the state's 8,167 active systems. Groundwater means the system draws its water from wells or springs fed by underground aquifers. 7,096 New York systems (87%) list groundwater as their primary source.
Who owns and regulates Roslyn Wd?
EPA lists Roslyn Wd as under public/private ownership. The NY state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 16 of the 44 active systems in Nassau County (36%) are also under public/private ownership.
Does Roslyn Wd have drinking water violations?
Of the 12 most recent violations in EPA's records, one is health-based, and the most recent began in January 1996. The violations listed here began between April 1994 and January 1996. By type: 11 monitoring and reporting and 1 contaminant level above the legal limit. The contaminants or rules involved are Lead and Copper Rule, Total coliform bacteria (TCR), Benzo(a)pyrene and Hexachlorobenzene. EPA lists 12 as resolved. Resolved means at least one resolving action is on record: the system returned to compliance, the rule no longer applies, or no further action was needed.
| Began | Violation | Contaminant or rule | Health-based | Status |
|---|---|---|---|---|
| 1996-01-01 | Monitoring and reportingFollow-up Or Routine LCR Tap M/R · code 52 | Lead and Copper Rulecode 5000 | No | Resolved |
| 1994-09-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 1994-04-01 | Monitoring and reportingMonitoring, Regular · code 03 | Benzo(a)pyrenecode 2306 | No | Resolved |
| 1994-04-01 | Monitoring and reportingMonitoring, Regular · code 03 | Hexachlorobenzenecode 2274 | No | Resolved |
| 1994-04-01 | Monitoring and reportingMonitoring, Regular · code 03 | Oxamylcode 2036 | No | Resolved |
| 1994-04-01 | Monitoring and reportingMonitoring, Regular · code 03 | Toluenecode 2991 | No | Resolved |
| 1994-04-01 | Monitoring and reportingMonitoring, Regular · code 03 | Benzenecode 2990 | No | Resolved |
| 1994-04-01 | Monitoring and reportingMonitoring, Regular · code 03 | 1,2-Dibromo-3-chloropropane (DBCP)code 2931 | No | Resolved |
| 1994-04-01 | Monitoring and reportingMonitoring, Regular · code 03 | 1,1-Dichloroethylenecode 2977 | No | Resolved |
| 1994-04-01 | Monitoring and reportingMonitoring, Regular · code 03 | trans-1,2-Dichloroethylenecode 2979 | No | Resolved |
| 1994-04-01 | Monitoring and reportingMonitoring, Regular · code 03 | 1,2-Dichloroethanecode 2980 | No | Resolved |
| 1994-04-01 | Monitoring and reportingMonitoring, Regular · code 03 | Dalaponcode 2031 | No | Resolved |
The 12 most recent violations in EPA's records, newest first.Labels and codes come from EPA's SDWIS reference tables. A monitoring or reporting violation means a required test or report was missed or late; it does not by itself mean a contaminant was found. "Health-based" marks violations of a legal limit or required treatment.
Roslyn Wd: frequently asked questions
Who runs Roslyn Wd?
Roslyn Wd (PWSID NY2902851) is a community water system under public/private ownership. It is regulated by the NY state drinking water program.
How many people does Roslyn Wd serve?
Roslyn Wd reports serving 17,000 people through 5,857 service connections in Nassau County, New York.
Where does Roslyn Wd get its water?
EPA SDWIS lists this system's primary water source as groundwater. Groundwater means the system draws its water from wells or springs fed by underground aquifers.
Does Roslyn Wd have any drinking water violations?
Of the 12 most recent violations in EPA's records, one is health-based, and the most recent began in January 1996. A monitoring or reporting violation means a required test or report was missed or late; it does not by itself mean a contaminant was found.
Is Roslyn Wd's water safe to drink?
AquaCensus shows EPA compliance records, not current water test results, so it cannot say whether the water is safe at a given moment. Of the 12 most recent violations in EPA's records, one is health-based, and the most recent began in January 1996. For current results, consult the system's annual water quality report, EPA ECHO, or the NY state drinking water program.
Where can I find Roslyn Wd's water quality report?
As a community water system, Roslyn Wd must deliver an annual water quality report, called a Consumer Confidence Report, to its customers by July 1 each year, covering the previous calendar year. The system can provide a copy on request.
Other water systems in Nassau County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Liberty Utilities New York - Lynbrook | Nassau | 220,000 | Community | Groundwater |
| Liberty Utilities New York - Merrick | Nassau | 135,000 | Community | Groundwater |
| Wa of Western Nassau | Nassau | 120,000 | Community | Groundwater |
| Town of Hempstead Water Department | Nassau | 110,000 | Community | Groundwater |
| Jericho Wd | Nassau | 58,000 | Community | Groundwater |
| Hempstead (V) | Nassau | 56,000 | Community | Groundwater |
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About this data
Source: U.S. EPA Safe Drinking Water Information System (SDWIS) and SDWA violation records, via EPA ECHO, as published October 1, 2026 — AquaCensus refreshes it quarterly. See the methodology for how records are matched, cleaned and scored.
Cite as: AquaCensus, “Roslyn Wd, PWSID NY2902851, New York”, https://aquacensus.com/water-systems/new-york/roslyn-wd-ny2902851 (data as of October 1, 2026).